668095 has 8 divisors (see below), whose sum is σ = 821520. Its totient is φ = 521280.

The previous prime is 668093. The next prime is 668111. The reversal of 668095 is 590866.

668095 = 204² + 205² + ... + 218².

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 668095 - 2¹ = 668093 is a prime.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 668095.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668093) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1425 + ... + 1834.

It is an arithmetic number, because the mean of its divisors is an integer number (102690).

2⁶⁶⁸⁰⁹⁵ is an apocalyptic number.

668095 is a deficient number, since it is larger than the sum of its proper divisors (153425).

668095 is a wasteful number, since it uses less digits than its factorization.

668095 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3305.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 668095 is about 817.3707848951. The cubic root of 668095 is about 87.4203901759.

The spelling of 668095 in words is "six hundred sixty-eight thousand, ninety-five".